Display Light Measurement for Under-Display Camera Uniformity
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Solution Overview
Problem
Existing display devices struggle to accurately measure light properties, particularly in regions with heterogeneous structures such as under-display cameras, leading to inconsistent luminance and chromaticity across different areas.
Innovation Solution
A method involving a higher-resolution measuring device to determine an appropriate window within the target region by iteratively adjusting its size and position, calculating average light characteristics, and minimizing standard deviation to accurately measure luminance and chromaticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a standard measurement method is used on heterogeneous display regions, then the measurement process is simple, but the measurement precision is insufficient due to varying light properties across different regions
Solution Approach 1:
The patent divides the display device into multiple measurement target regions (first measurement target region and second measurement target region) with different structures. Each region is measured separately with appropriate correction values applied, enabling precise measurement of heterogeneous regions while maintaining a systematic measurement approach.
Solution Approach 2:
The patent applies different correction values to different measurement target regions based on their specific structural characteristics. The first correction value is applied to the first measurement target region and the second correction value to the second measurement target region, allowing each region to be measured with optimized parameters for its specific light properties.
2Adaptability or versatility
If the pixel arrangement or wiring structure in the camera region is made different from remaining regions to accommodate under-display camera, then the camera functionality is achieved, but the light properties become non-uniform across the display
Solution Approach 1:
The patent recognizes and accommodates the heterogeneous structure by applying different correction values to different regions. The first measurement target region (with camera) receives a first correction value while the second measurement target region (without camera) receives a second correction value, ensuring each region's light properties are properly corrected despite their differences.
Solution Approach 2:
The patent segments the display into distinct measurement target regions based on their structural differences. By identifying and separately measuring the camera region and non-camera regions, the patent enables proper correction for each heterogeneous area while maintaining overall display functionality.
3Measurement precision
If a single correction value is applied to all display regions, then the correction process is simple, but the image display accuracy varies across different regions with different light properties
Solution Approach 1:
The patent applies different correction values to different measurement target regions based on their specific structural characteristics. The first correction value is applied to the first measurement target region and the second correction value to the second measurement target region, allowing each region to be corrected with optimized parameters for its specific light properties.
Data Source
AI summary
A method of measuring light properties of a display device includes measuring the light properties of a measurement target region of a display device with a measuring device having a higher resolution than that of the display device, determining an appropriate window for a target region, repeatedly changing the position of the appropriate window within the target region, calculating the average value of light properties within the appropriate window for each position of the appropriate window, and averaging the average values of the light properties within the appropriate window and determining an average light characteristic value of the measurement target region.